Remelting device for producing high-purity silicon by using silicon slag
By processing silicon slag through crushing and screening mechanisms, combined with automated feeding and electric heating, the problem of low efficiency in direct smelting of silicon slag has been solved, achieving efficient extraction of high-purity silicon and reducing production costs and environmental pressure.
Patent Information
- Application Number
- CN202422024999.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-08-21
AI Technical Summary
Existing silicon slag smelting equipment suffers from low efficiency in direct smelting due to the large volume of silicon slag, making it difficult to effectively extract high-purity silicon, resulting in resource waste and increased production costs.
A remelting device including crushing, screening and smelting mechanisms was designed. The silicon slag is first crushed and then screened and smelted. The device achieves efficient processing of silicon slag by using a vibrating screening structure and electric heating tubes, combined with an automated feeding and sealing mechanism.
It improves the smelting efficiency of silicon slag, effectively extracts high-purity silicon, reduces resource waste and production costs, and enables automated operation.
Smart Images
Figure CN223491026U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of smelting equipment technology, and in particular to a remelting device for producing high-purity silicon using silicon slag. Background Technology
[0002] In today's technological and industrial fields, the demand for high-purity silicon is increasing. As an important semiconductor material, silicon is widely used in electronics, photovoltaics, and many other industries. However, the silicon production process generates a large amount of silicon slag. This slag usually contains a certain amount of silicon, but due to the presence of impurities, its purity is low and it cannot be directly used for high-end applications. Existing silicon slag processing methods generally involve transporting it through transfer equipment and feeding it into a melting furnace for direct melting. However, this method is often inefficient due to the large volume of silicon slag, and it is difficult to effectively extract high-purity silicon. This not only wastes resources but also increases production costs and environmental pressure. Based on this, we designed a melting equipment with crushing and screening functions to improve the melting efficiency of silicon slag. Utility Model Content
[0003] In view of the technical problems existing in the background art, this utility model provides a remelting device for producing high-purity silicon using silicon slag, which solves the problem that the existing silicon slag smelting equipment is often inefficient for direct smelting due to the large volume of silicon slag, and it is difficult to effectively extract high-purity silicon.
[0004] The technical implementation scheme of this utility model is as follows:
[0005] A remelting device for producing high-purity silicon using silicon slag includes a fixed support, a screening mechanism, a crushing mechanism, and a smelting mechanism. The fixed support is a rectangular frame structure, and the smelting mechanism and screening mechanism are arranged inside the fixed support. The screening mechanism includes a screening box, a screening screen, a vibrator, a first sliding bar, and a discharge port. The screening box is a rectangular cavity structure with openings at both ends. The screening screen is arranged inside the screening box, and the screening screen is connected to the internal vibrator to form a vibrating screening structure. The smelting mechanism includes a smelting tank, an inner layer, a sealing cover, a sealing block, and a first pneumatic cylinder. The smelting tank is a cylindrical cavity structure with openings at both ends. An isolation layer structure is formed inside the smelting tank through the inner layer. An electric heating tube is arranged inside the isolation layer. A sealing cover and a sealing block are respectively arranged at both ends of the smelting tank. The upper part of the sealing block is connected to the first pneumatic cylinder. The screening mechanism is connected to the smelting mechanism through a feeding support.
[0006] Optionally, the screening screen is slidably connected to the first sliding strip on the inner wall of the screening box via the first sliding grooves on both sides, and the screening screen has a number of screen holes inside; a discharge port is provided on one side of the screening box.
[0007] Optionally, the upper part of the sealing cover is provided with a feed inlet, the upper part of the feed inlet is provided with a second pneumatic cylinder and a sealing plate, one end of the feed inlet is provided with a connecting plate, and the connecting plate is provided with a second pneumatic cylinder, the output end of the second pneumatic cylinder is connected to the sealing plate; the two sides of the sealing plate are slidably connected to the second sliding groove on the inner wall of the feed inlet through the second sliding strip.
[0008] Optionally, the sealing block is set on the sealing base, and a second guide groove is provided between the sealing base and the sealing block, and the second guide groove is provided with a plurality of discharge holes; the two sides of the sealing base are connected to the output shaft of the first pneumatic cylinder through connecting plates.
[0009] Optionally, it also includes a crushing mechanism, which includes a crushing tank, a crushing rotor, a drive box, and a drive motor. The crushing tank is located on the upper part of the screening box, and the crushing rotor is installed inside the crushing tank. The crushing rotor is connected to the drive box through a connector. The drive motor is located on the drive box.
[0010] Optionally, a purification mechanism is provided at the top of the crushing tank. The purification mechanism includes a first material guide trough, a blower, a flow guide pipe, and a purification box. The first material guide trough is located at the top of the crushing tank and is connected to the purification box through the blower and the flow guide pipe.
[0011] Optionally, a guide plate is provided at the bottom of the screening box, and a hopper is provided at the lower part of the guide plate, with one end of the hopper connected to the feed inlet of the feeding bracket.
[0012] Optionally, the feeding bracket is equipped with a conveyor belt inside, and the conveyor belt is equipped with several feeding troughs.
[0013] This utility model has the following advantages:
[0014] 1. This utility model has a crushing mechanism installed on the upper part of the fixed support. The crushing rotor inside the crushing tank can crush the silicon slag, crush the lumps of silicon slag, and introduce them into the screening mechanism below for screening. This method of crushing before smelting can improve the efficiency of smelting.
[0015] 2. In this utility model, a feeding bracket is set at the bottom of the screening mechanism, which can automatically feed the screened silicon slag, lift it and guide it into the melting mechanism, thereby realizing automated feeding.
[0016] 3. In this utility model, a sealing cover and an opening and closing mechanism are provided on the upper part of the melting tank. The sealing cover is provided with a sealing plate at the feed port, which is pushed by a second pneumatic cylinder to facilitate opening and closing during feeding. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model.
[0018] Figure 2 This is the front view of the present invention.
[0019] Figure 3 This is a schematic diagram of the crushing mechanism of this utility model.
[0020] Figure 4 This is a schematic diagram of the connection between the crushing mechanism and the purification mechanism of this utility model.
[0021] Figure 5 This is a schematic diagram of the screening mechanism of this utility model.
[0022] Figure 6 This is a schematic diagram of the smelting mechanism of this utility model.
[0023] Figure 7 This is a schematic diagram of the connection structure of the sealing plate of this utility model.
[0024] Figure 8 This is a schematic diagram of the structure of the screening box of this utility model.
[0025] Figure 9 This is a schematic diagram of the sealing block part of this utility model.
[0026] The meanings of the reference numerals in the figure are as follows: 1-Fixed bracket, 2-Screening mechanism, 201-, 202-Screening screen, 203-Guide plate, 204-Discharge port, 205-Screen hole, 206-First chute, 207-Vibrator, 208-First slide bar, 3-Pulverizing mechanism, 301-Pulverizing trough, 302-Pulverizing rotor, 303-Drive box, 304-Drive motor, 4-Purification mechanism, 401-First guide chute, 402-Guide fan, 4 03-Guide pipe, 404-Purification box, 5-Smelting mechanism, 501-Smelting tank, 502-Inner layer, 503-First pneumatic cylinder, 504-Output shaft, 505-Sealing block, 506-Sealing cover, 507-Feed inlet, 508-Second chute, 509-Sealing plate, 510-Second pneumatic cylinder, 511-Second guide chute, 512-Discharge hole, 513-Connecting plate, 514-Sealing base, 6-Feeding bracket, 7-Hopper. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.
[0028] like Figures 1-9As shown, a remelting device for producing high-purity silicon using silicon slag includes a fixed support 1, a screening mechanism 2, a crushing mechanism 4, and a smelting mechanism 5. The fixed support 1 is a rectangular frame structure, and the smelting mechanism 5 and the screening mechanism 2 are arranged inside the fixed support 1. The screening mechanism 2 includes a screening box 201, a screening screen 202, a vibrator 207, a first sliding bar 208, and a discharge port 204. The screening box 201 is a rectangular cavity structure with openings at both ends. The screening screen 202 is arranged inside the screening box 201, and the screening screen 202 is connected to the internal vibrator 207 to form a vibrating screening structure. The smelting mechanism 5 includes a smelting tank 501, an inner layer 502, a sealing cover 506, and a sealing valve. The sealing block 505 and the first pneumatic cylinder 503 are included. The melting tank 501 is a cylindrical cavity structure with open ends. An isolation layer structure is formed inside the melting tank 501 through the inner layer 502. An electric heating tube is installed inside the isolation layer. A sealing cover 506 and a sealing block 505 are respectively installed at both ends of the melting tank 501. The upper part of the sealing block 505 is connected to the first pneumatic cylinder 503. The screening mechanism 2 is connected to the melting mechanism 5 through the feeding bracket 6. The screening screen 202 is slidably connected to the first sliding strip 208 on the inner wall of the screening box 201 through the first sliding grooves 206 on both sides. The screening screen 202 has a number of screen holes 205 inside. A discharge port 204 is provided on one side of the screening box 201.
[0029] It should be noted that in order to recycle and smelt silicon slag, direct smelting is generally used. However, some silicon slag agglomerates into lumps, and if it is directly put into the smelting furnace, the smelting effect is not good. Based on this, we designed a device that can crush the slag first and then smelt it, thereby improving the smelting effect.
[0030] It should be further explained that we have set up a crushing mechanism 4 and a screening mechanism 2 on the upper part of the fixed support 1. The function of the crushing mechanism 4 is to crush the lumps of silicon slag. During the crushing process, the two crushing rotors 302 are driven to rotate in opposite directions by the drive box 303, thereby crushing the material and guiding the crushed silicon slag into the screening mechanism 2 at the bottom for screening. The qualified silicon slag is discharged from the bottom of the screening screen 202, and the unqualified slag is discharged from the discharge port 204 for crushing again.
[0031] It should be further explained that we also set a melting mechanism 5 on the upper part of the fixed support 1, and set an inner layer 502 structure inside the melting tank 501. An electric heating tube is set between the two to heat the silicon slag inside the melting tank 501. In addition, we designed a sealing cover 506 for convenient feeding. The sealing block 505 on the upper part of the cover is driven by the first pneumatic cylinder 503 to realize automatic opening and closing, which, together with the feeding support 6, realizes the automatic discharge and sealing of silicon slag.
[0032] like Figure 1 , Figure 3 and Figure 4 As shown, the upper part of the sealing cover 506 is provided with a feed inlet 507, and the upper part of the feed inlet 507 is provided with a second pneumatic cylinder 510 and a sealing plate 509. One end of the feed inlet 507 is provided with a connecting plate, and the second pneumatic cylinder 510 is provided on the connecting plate. The output end of the second pneumatic cylinder 510 is connected to the sealing plate 509. The two sides of the sealing plate 509 are slidably connected to the second sliding groove 508 on the inner wall of the feed inlet 507 through the second sliding strip. The sealing block 505 is provided on the sealing base 514, and a second guide groove 511 is provided between the sealing base 514 and the sealing block 505. The second guide groove 511 is provided with a plurality of discharge holes 512. The two sides of the sealing base 514 are connected to the output shaft 504 of the first pneumatic cylinder 503 through the connecting plate 513.
[0033] It should be noted that the sealing cover 506 is slidably connected to the second slide groove 508 on the inner wall of the feed port 507 via the second slide strip on both sides, and is pushed forward by the second pneumatic cylinder 510 to achieve automated sealing. This facilitates automated feeding in conjunction with the feeding bracket 6. After feeding is completed, the sealing cover 506 is pushed forward by the second pneumatic cylinder 510 to close the feed port 507 and prevent internal hot gas from escaping during melting.
[0034] It should be further explained that, for the convenience of material discharge, a sealing base 514 is set at the bottom of the melting tank 501, and a sealing block 505 is set on the upper part of it. The first pneumatic cylinder 503 pushes it to achieve lifting and lowering. The edge of the entire sealing block 505 is inclined to match the discharge port of the melting tank 501, so as to facilitate fixing and sealing.
[0035] It should be further explained that when the sealing base 514 is opened and the sealing block 505 leaves the outlet of the melting tank 501, the liquid material inside will overflow at the same time. In order to facilitate the material guiding, we have provided several discharge holes 512 on the second material guiding channel 511 to facilitate the timely discharge of the liquid material entering the second material guiding channel 511. Moreover, the entire sealing block 505, the second material guiding channel 511 and the sealing block 505 are coated to improve the heat resistance.
[0036] like Figures 1-4 As shown, the crushing mechanism 3 includes a crushing tank 301, a crushing rotor 302, a drive box 303, and a drive motor 304. The crushing tank 301 is located on the upper part of the screening box 201. The crushing rotor 302 is installed inside the crushing tank 301. The crushing rotor 302 is connected to the drive box 303 through a connector. The drive motor 304 is installed on the drive box 303.
[0037] It should be noted that the crushing tank 301 is located at the feed inlet of the screening box 201. The two crushing rotors 302 are driven to rotate by the drive box 303, thereby completing the crushing process of the silicon slag blocks.
[0038] like Figures 1-4 As shown, a purification mechanism 4 is provided on the upper part of the crushing tank 301. The purification mechanism 4 includes a first material guide trough 401, a blower 402, a flow guide pipe 403, and a purification box 404. The first material guide trough 401 is provided on the upper part of the crushing tank 301 and is connected to the purification box 404 through the blower 402 and the flow guide pipe 403.
[0039] It should be noted that a large amount of dust is generated during the crushing of silicon slag. In order to prevent dust from polluting the working environment, we set an air outlet at the top of the first feed trough 401. The air outlet is connected to the purification box 404 through the blower 402 and the guide pipe 403 to introduce the dust-laden gas into the purification box 404 for dust removal.
[0040] like Figures 1-5 As shown, a guide plate 203 is provided at the bottom of the screening box 201, and a hopper 7 is provided at the lower part of the guide plate 203. One end of the hopper 7 is connected to the feed inlet of the feeding bracket 6. A conveyor belt is provided inside the feeding bracket 6, and several feeding troughs are provided on the conveyor belt.
[0041] It should be noted that the guide plate 203 is designed to facilitate the discharge of materials after screening by the screening box 201 and to guide the materials into the hopper 7, so as to lift the materials in conjunction with the feeding bracket 6.
[0042] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.
Claims
1. A remelting apparatus for producing high-purity silicon using silicon slag, comprising a fixed support (1), a screening mechanism (2), a purification mechanism (4), and a smelting mechanism (5), characterized in that, The fixed support (1) is a rectangular frame structure, and the fixed support (1) is equipped with a melting mechanism (5) and a screening mechanism (2); The screening mechanism (2) includes a screening box (201), a screening screen (202), a vibrator (207), a first slide bar (208), and a discharge port (204). The screening box (201) is a rectangular cavity structure with openings at both ends. The screening box (201) is equipped with a screening screen (202), and the screening screen (202) is connected to the vibrator (207) inside to form a vibrating screening structure. The melting mechanism (5) includes a melting tank (501), an inner layer (502), a sealing cover (506), a sealing block (505), and a first pneumatic cylinder (503). The melting tank (501) is a cylindrical cavity structure with openings at both ends. An isolation layer structure is formed inside the melting tank (501) through the inner layer (502). An electric heating tube is installed inside the isolation layer. A sealing cover (506) and a sealing block (505) are respectively installed at both ends of the melting tank (501). The upper part of the sealing block (505) is connected to the first pneumatic cylinder (503); The screening mechanism (2) is connected to the smelting mechanism (5) via the feeding support (6); It also includes a crushing mechanism (3), which includes a crushing tank (301), a crushing rotor (302), a drive box (303) and a drive motor (304). The crushing tank (301) is located on the upper part of the screening box (201). The crushing rotor (302) is installed inside the crushing tank (301). The crushing rotor (302) is connected to the drive box (303) through a connector. The drive motor (304) is mounted on the drive box (303).
2. The remelting apparatus for producing high-purity silicon using silicon slag according to claim 1, characterized in that, The screening screen (202) is slidably connected to the first sliding strip (208) on the inner wall of the screening box (201) through the first sliding groove (206) on both sides, and the screening screen (202) is provided with a number of screen holes (205); A discharge port (204) is provided on one side of the screening box (201).
3. A remelting apparatus for producing high-purity silicon using silicon slag according to claim 1, characterized in that, The upper part of the sealing cover (506) is provided with a feed inlet (507), the upper part of the feed inlet (507) is provided with a second pneumatic cylinder (510) and a sealing plate (509), one end of the feed inlet (507) is provided with a connecting plate, and the connecting plate is provided with a second pneumatic cylinder (510), the output end of the second pneumatic cylinder (510) is connected to the sealing plate (509); The sealing plate (509) is slidably connected to the second slide groove (508) on the inner wall of the feed inlet (507) via the second slide strip on both sides.
4. A remelting apparatus for producing high-purity silicon using silicon slag according to claim 1, characterized in that, The sealing block (505) is set on the sealing base (514), and a second guide groove (511) is provided between the sealing base (514) and the sealing block (505). The second guide groove (511) is provided with a plurality of discharge holes (512). The sealing base (514) is connected to the output shaft (504) of the first pneumatic cylinder (503) on both sides via connecting plates (513).
5. A remelting apparatus for producing high-purity silicon using silicon slag according to claim 1, characterized in that, A purification mechanism (4) is provided on the upper part of the crushing tank (301). The purification mechanism (4) includes a first material guide trough (401), a blower (402), a flow guide pipe (403), and a purification box (404). The first material guide trough (401) is located on the upper part of the crushing tank (301). The first material guide trough (401) is connected to the purification box (404) through the blower (402) and the flow guide pipe (403).
6. A remelting apparatus for producing high-purity silicon using silicon slag according to claim 1, characterized in that, The bottom of the screening box (201) is provided with a guide plate (203), and a hopper (7) is provided at the bottom of the guide plate (203). One end of the hopper (7) is connected to the feed inlet of the feeding bracket (6).
7. A remelting apparatus for producing high-purity silicon using silicon slag according to claim 6, characterized in that, The feeding bracket (6) is equipped with a conveyor belt inside, and the conveyor belt is equipped with several feeding troughs.